Air-heating stove-lid.



12B. LEWIS.

AIR HEATING STOVE LID.

APPLICATION FILED SEPT. 12, 1912.

Patented Aug. 5, 1913.

wi tweooeo COLUMBIA PLANGGRAFH CO.,WASHINGTON, D c.

UNITED STATES PATENT @FFIQE.

THOMAS E. LEWIS, OF SCRANTON, PENNSYLVANIA.

AIR-HEATING STOVE-LID.

Specification of Letters Patent.

Patented Aug. 5,1913.

Application filed September 12, 1912. Serial No. 720,061.

To aZZ whom it may concern:

Be it known that I, THOMAS E. Lewis, a. citizen of the United States,residing at Scranton, in the county of Lackawanna and State ofPennsylvania, have invented certain new and useful Improvements in Air-Heating StoveLids; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to stoves and furnaces, and more especially tothe lids thereof; and the object of the same is to construct a platewhich if let into the stove top becomes a lid and which itself carriesan air-admitting damper and means for heating the air before it ispassed into the interior of the stove to be consumed. This object iscarried out by forming the plate on its inner side with a spider orcasting in the shape of a wheel, and conducting the air in a tortuouscourse through channels formed in the spokes and rim of such wheelbefore it is finally admitted into the fireboxall as hereinafter morefully described and claimed, and as shown in the drawings wherein-Figure 1 is a section through a stove top and a side or edge view ofthis improved lid, and Fig. 2 is a plan view of the lid alone. Fig. 3 isan enlarged horizontal section of the lid, taken just beneath its topplate. Figs. 4, 5 and 6 are cross sections, taken respectively on thelines -fl l, 5*?) and 6-6 of Fig. 2.

Referring to the drawings, the numeral 1 designates a plate which ismade round and may serve as a lid for closing a hole in the ordinarystove top, but which could have other configuration without departingfrom the spirit of my invention. I will, how ever, refer to it herein asa stove lid, because that is the use I propose ordinarily to make of it.WVith such end in view, then, the plate 1 will be round and rather thin,and of a size to close the ordinary potopening in a stove as usual; andit may be provided with a recess 2 for inserting the ordinary lid-lifteras usual. At a proper point the plate 1 is pierced with an inlet opening3 which is formed in the bottom of a depressed portion 4 preferably maderectangular, and in said depression rests a slide 5 having an opening 6adapted, when the slide is moved, to be brought more or less intoregister with the inlet opening 3 so that the operator may control thevolume of air admitted through the plate 1. This detail as a whole wemay call a damper, and

its specific construction is not essential to the present inventionfurther than it should be located as hereinafter described.

To the under side of the plate is secured a metal casting or spider 9formed substantially in the shape of a wheel as best seen in Fig. 8;and, if it be a casting separate from the plate 1, it will have lugs orears 7 through which may pass rivets 8 that also engage the plate forholding the spider.- thereto. The rim 10 of the spider is circular inout-line and stands just within the lugs or ears 7 as shown, and it isby preference U-shaped in cross section so that its interior forms achannel whose top is closed by the plate and which channel extendsaround said plate near the periphery thereof. Inside this rim aredisposed four or more spokes which are by preference cast integral withthe rim and of substantially U-shape cross section so as to formchannels which also are closed by the plate 1 as described. Vhat mightbe called the main or master spoke 11 has two longitudinal partitions 12within its channel, so that said channel is sub-divided into threeparts. The intermediate of these we will call the inlet channel 13 andits outer end communicates with the inlet opening 3 through the plat-e1, for which purpose it will be necessary to dispose said inlet openingoilcenter in the plate and near the periphery thereof as shown.

The inner end of the inlet channel 13 communicates with the hub of thewheelshaped spider at 1 1. In the embodiment of my invention shown inthe drawings, there is a second spoke 15 directly opposite the masterspoke. The infiowing air passes from the hub 14 through the length ofthe spoke 15, and out of the outer end of the latter at the point 16into the rim 10, thence it is divided and pass-es around within said rimas indicated by the arrows, practically to the point of starting, wherethe two streams of air respectively enter the outside channels 17 in themaster spoke 11 and again flow inward in the hub 14 to the points 18 butentirely out of communication with the cooler air flowing through theinlet channel 13.

In addition to the master spoke 11 and the spoke 15 opposite thereto, Iprovide what we will call lateral spokes of which but two are shown inthe present embodiment of my invention radiating from the hub. Each ofthese lateral spokes 21 has a single longitudinal partition 22 connectedat its inner end at the point 23 with the nearest partition wall 12 ofthe inlet channel 13 and at its outer end at the point 2% with the innerwall 25 of the rim 10; and at one side of the partition 22 is a channel26 which leads from the hub radially outward into the interior-of therim. It follows that the inflowing cool air travels the coursedesignated by the arrows, and while some of passes along the spoke 15,some of it also passes outward through the channels 26 within thelateral spokes 21 and finds its way into the rim 10. It will be obviousthat if there are more than two of the lateral spokes, the air will besplit up into still finer divisions than illustrated. On the other sideof the partition 22 the space within each lateral spoke 21 constitutesan exit channel 32 opening at the point 18 into the nearest outsidechannel 17 of the master spoke 11, and closed at its outerend atthepoint 33 by the inner wall 25 of the rim 10;

and the bottom wall of each exit channel 32' is pierced withperforations as at 34:. It follows from this construction that the airafter passing along the master spoke and the spoke l5 opposite thereto,and thence around within the rim 10, passes along the outside channels17 of said master spoke, thence into and along the exit channels of saidlateral spokes, and finally out of the perforations 8st therein and intothe space under the plate 1 which, of course, communicates with theinterior of the stove or furnace. Thus it'will be seen that byopeningthe damper to a proper extent, cold air is admitted through the coverplate 1 of this lid, and the structure of the casting or spider carriedthereby causes the air to pass first to the center of the same, thencethrough the diffusing spokes to the rim of the same, then backagainalmost to the point of starting, and then a second time along the masterspoke, radially outward from the hub, and through the perforations intothe interior of the stove body. Througlr out this course the air issubjected to considerable heat as will be clear, and the re sult is thatby the time the air finds its way into the firebox it is in a highlyheated condition so that it does not retard the firenor subtract fromthe efficiency thereof for the purpose of heating the air ordinarilyadmitted through the inlet damper. If this device become a part of astove lid as I'contemplate, such lid can of course be instantly removedfro-1n the stove top and replaced by another, or it may be placed overthe pothole as desired. The advantages of devices of this character aretoo well known to be amplified here, and of course I do not limit itsuse to any specified type of stove or furnace.

What is claimed as new is:

An air-heating stove lid comprising a plate having an inlet openingthrough it, and a wheel-shaped casting beneath said plate havingchannels in its spokes and rim closed by the plate, one of the spokesbeing enlarged and having two longitudinal partitions within its channelsub-dividing the latter into an inlet channel communicating at its outerend with said opening and at its inner end with the hub of the wheel,and two side channels communicating at their outer ends with the rim ofthe wheel; and the lateral spokes containing partitions producing diiiusing and exit channels, the former communicating at their extremitieswith said hub and rim, and the latter having their inner extremitiescommunicating with said side channels, their out-er extremities closed,and their side walls perforated,

for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

THOMAS E. LEWVIS'. \Vitnesses PATRICK L. GLANCEY, DAVID 'ROWLANDS'.'

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

